Installation in a subfolder works but not at the root

I've installed Ionize in a sub-folder, after everything is correct, I moved it at the root and got problems, so I've cleaned everything and made a fresh install at the root. Everything is correct until login which doesn't work.So i've reinstalled again by giving 777 on all files and folder, choose an admin/admin log/pass, language by default, but still the same.Log file gave me this error :